eclipse installation procedure

Once you have downloaded the packages you are interested in, you should
unpack them all from the same directory. You always need to download
eclipse-main, which contains the libraries. Then depending on which
instrument you want to work on, you want to download one of the
complementary instrument packages (Adonis, ISAAC). If you have
downloaded language packages (Lua, Python), they should also be unpacked
from the same level as the base library.